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mod

Double SlabsMinecraft mod for 1.21.1

Allows vanilla and modded slabs to be combined and placed vertically

client and servernewest supported 1.21.1Game MechanicsDecoration
Latest version
1.21.1-0.4.2
Minecraft
1.12 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
GPL-3.0-only
Downloads
39.6k
Updated
3 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Double Slabs servers

One click and Double Slabs is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Double Slabs declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge, Fabric21+declared8 Aug 2024
1.20.1Fabric, NeoForge, Forge17+declared12 Jun 2023
1.19.4Forge, NeoForge, Fabric17+declared14 Mar 2023
1.19.3Forge, NeoForge, Fabric17+declared7 Dec 2022
1.19.2Forge, NeoForge, Fabric17+declared5 Aug 2022
1.19.1Forge, NeoForge, Fabric17+declared27 Jul 2022
1.19Fabric, NeoForge, Forge17+declared7 Jun 2022
1.18.2NeoForge, Forge, Fabric17+declared28 Feb 2022
1.18.1Fabric, NeoForge, Forge17+declared10 Dec 2021
1.18Forge, NeoForge, Fabric17+declared30 Nov 2021
1.17.1Forge, NeoForge, Fabric16+declared6 Jul 2021
1.17Forge, NeoForge, Fabric16+declared8 Jun 2021
1.16.5Forge, NeoForge, Fabric8+declared14 Jan 2021
1.16.4Forge, NeoForge, Fabric8+declared29 Oct 2020
1.16.3Forge, Fabric, NeoForge8+declared10 Sept 2020
1.16.2NeoForge, Forge, Fabric8+declared11 Aug 2020
1.16.1Fabric, NeoForge, Forge8+declared24 Jun 2020
1.16Forge, NeoForge, Fabric8+declared23 Jun 2020
1.15.2Forge, NeoForge, Fabric8+declared17 Jan 2020
1.15.1Forge, NeoForge, Fabric8+declared16 Dec 2019
1.15Forge, NeoForge, Fabric8+declared9 Dec 2019
1.14.4Fabric, NeoForge, Forge8+declared19 Jul 2019
1.14.3NeoForge, Forge, Fabric8+declared24 Jun 2019
1.14.2Fabric, NeoForge, Forge8+declared27 May 2019
1.14.1Forge, NeoForge, Fabric8+declared13 May 2019
1.14Forge, NeoForge, Fabric8+declared23 Apr 2019
1.12.2Forge, NeoForge, Fabric8+declared18 Sept 2017
1.12.1Forge, NeoForge, Fabric8+declared3 Aug 2017
1.12Forge, NeoForge, Fabric8+declared2 Jun 2017

Download

From Double Slabs’s own host. Nothing is re-hosted here.

1.21.1-0.4.2release13 Jun 2026

doubleslabs-fabric-1.21.1-0.4.2.jar · 0.2 MB · for 1.21.1

Download latest
6c09f11c766f…
Older versions20
  • 1.20.1-0.2.313 Jun 20261.20.10.2 MB735 downloads15d502fe5690…Get
  • 1.21.1-0.4.110 Jan 20261.21.10.2 MB4.0k downloadsa0747defd747…Get
  • 1.20.1-0.2.210 Jan 20261.20.10.2 MB2.1k downloads9aca894a9213…Get
  • 1.21.1-0.4.010 Jan 20261.21.10.2 MB211 downloadsa0f6fc941d66…Get
  • 1.20.1-0.2.010 Jan 20261.20.10.2 MB5.6k downloadsfcd75e50b173…Get
  • 1.20.1-0.1.25 Aug 20251.20.10.2 MB3.6k downloads334249b569b5…Get
  • 1.20.1-0.1.13 Aug 20251.20.10.2 MB177 downloads55d83df352e3…Get
  • 1.20.1-0.1.03 Aug 20251.20.10.2 MB1.5k downloadsbf5a661a5410…Get
  • 1.21.1-0.3.02 Aug 20251.21.10.2 MB3.4k downloads3b0ea1062992…Get
  • 1.21.1-0.2.328 Jun 20251.21.10.1 MB638 downloads725f3a358bd9…Get
  • 1.21.1-0.2.28 Jun 20251.21.10.1 MB32 downloads743fc9b9ade2…Get
  • 1.21.1-0.2.18 Jun 20251.21.10.1 MB30 downloads47ed69196646…Get
  • 1.21.1-0.2.031 May 20251.21.10.1 MB64 downloads9e70fd970c84…Get
  • 1.19-6.1.031 May 20251.19.4, 1.19.3, 1.19.2, 1.19.1, 1.190.2 MB513 downloadse69013cb3285…Get
  • 1.18-5.0.031 May 20251.18.2, 1.18.1, 1.180.2 MB566 downloads855949e94c7b…Get
  • 1.17-4.0.031 May 20251.17.1, 1.170.2 MB44 downloads06e66521cfd7…Get
  • 1.16-3.7.331 May 20251.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1 +1 more0.3 MB646 downloads3e61186aa889…Get
  • 1.15-2.12.131 May 20251.15.2, 1.15.1, 1.150.3 MB88 downloads089a0316ddf0…Get
  • 1.14-1.12.031 May 20251.14.4, 1.14.3, 1.14.2, 1.14.1, 1.140.3 MB85 downloads25fd59a75833…Get
  • 1.12-0.12.231 May 20251.12.2, 1.12.1, 1.120.3 MB1.4k downloads936df097fc1e…Get

Frequently asked

Does Double Slabs work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Double Slabs declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Double Slabs support?

Everything the author has declared, from 1.12 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Double Slabs on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Double Slabs support?

NeoForge, Forge, Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Double Slabs?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Double Slabs under?

GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Double Slabs?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Double Slabs safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .